Short description
Transform your Shelly Pro device into a powerful sensor hub with the Shelly Pro Sensor Add-on. This galvanically isolated interface lets you connect multiple sensor types for real-time monitoring and advanced automation in any environment - residential, commercial, or industrial.
It provides two 1-Wire interfaces, two analog inputs (0-10V), two digital inputs (±15V), and a potential-free solid-state relay output, giving you maximum flexibility to build customized, intelligent solutions.
Compatible with most Arduino sensors, the Shelly Pro Sensor Add-on opens the door to limitless applications.
Main features
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Expands functionality of selected Shelly Pro devices with additional sensor connectivity.
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Galvanically isolated for safe and reliable operation.
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Supports multiple sensor types for advanced automation.
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2× DATA (1-wire data terminals) – connect up to five DS18B20 temperature sensors, one DHT22 for temperature and humidity, or other 1-Wire devices.
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2× Analog inputs (0-10V) – suitable for sensors such as CO₂, pressure, light, or other analog types.
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2× Digital inputs (±15V) – for motion detectors, leak sensors, switches, and more.
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1× Potential-free solid-state relay input – ideal for relays, alarms, or other external circuits.
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Compatible with most Arduino sensors for custom projects.
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Ideal for DIN rail installations in residential, commercial, and industrial environments.
Use cases
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Monitor and Control Critical Conditions
Install the Shelly Pro Add-on in your DIN-mounted setup to track temperature, humidity, open doors/windows, or other key data directly from the electrical panel. -
Optimize HVAC and Energy Use
Connect temperature, humidity, and other sensors to fine-tune heating, cooling, and ventilation for maximum comfort and efficiency. -
Automate Lighting with Motion Detection
Use a PIR sensor to turn lights on only when a room is occupied - ideal for hallways, storage areas, or office spaces. -
Protect Against Leaks and Weather
Integrate water leak, rain, or wind sensors to safeguard your property and automatically react to environmental changes. -
Smart Irrigation and Outdoor Control
Pair with a soil moisture sensor to water only when needed, or automate awnings and blinds for weather protection and comfort. -
Custom Projects and Specialized Monitoring
Leverage compatibility with Arduino sensors to build unique solutions for homes, aquariums, or industrial applications.
Main applications
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Residential
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MDU (Multi Dwelling Units - apartments, condominiums, hotels, etc.)…
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Light commercial (small office buildings, small retail/restaurant/gas station, etc.)…
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Government/municipal
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University/college
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Farming
Integrations
Amazon Alexa supported capabilities
N/A
Google Smart Home supported traits
N/A
Samsung SmartThings supported capabilities
N/A
Device electrical interfaces
Inputs
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2x Analogue inputs (0-10 V)
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2x Digital inputs (±15 V)
Outputs
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1x Potential-free solid-state relay output
1-wire terminals
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2x DATA (independent)
Power / Reference
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2x GND
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1x VREF
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1x VREF + R1
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1x VCC
Add-on interface
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Shelly proprietary serial interface to connect to a Shelly Pro device
Supported Sensors
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Up to 5x DS18B20 temperature sensors per channel.
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DHT22 temperature and humidity sensors.
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NTC resistors with 10 kΩ nominal resistance and β=4000 K
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Photoresistors
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PIR sensors
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Soil moisture sensors
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Ultrasonic proximity sensors
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Capacitive liquid level sensors
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Sound detectors
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Other analog sensors with 0 to 10 V output voltage
Specifications
|
Quantity |
Value |
|---|---|
|
Physical |
|
|
Size (HxWxD): |
94x19x69 / 3.70x0.75x2.71 |
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Weight: |
45 g / 1.59 oz |
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Mounting: |
DIN Rail |
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Conductor cross section: |
0.2 to 0.5 mm² / 24 to 20 AWG |
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Conductor stripped length: |
5 to 8 mm / 0.20 to 0.31 in |
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Shell material: |
Plastic |
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Shell color: |
Black |
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Connectors color: |
Black |
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Environmental |
|
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Ambient working temperature: |
-20 °C to 40 °C / -5 °F to 105 °F |
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Humidity: |
30% to 70% RH |
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Max. altitude: |
2000 m / 6562 ft |
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Electrical |
|
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Power supply: |
12 V (from compatible Shelly device) |
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Power consumption: |
< 0.5 W (without sensors) |
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Digital input: |
-15 V to 0.5 V (True) / 2.5 V to 15 V (False)* |
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Analog input range: |
0 to 100% |
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Analog input report threshold: |
1%** |
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Voltmeter range: |
0 to 10 V |
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Voltmeter report threshold: |
0.1 V** |
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Analog input / Voltmeter accuracy |
Better than ±5% |
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Output circuits ratings |
|
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VCC max. current: |
10 mA |
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VREF max. current: |
2 mA |
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VREF+R1 resistor |
10 kΩ |
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Max switching voltage: |
30 V |
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Max switching current: |
300 mA |
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Microcontroller unit |
|
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CPU: |
STM32G071GBU6 |
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Compatible devices: |
|
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Others |
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Temperature reading accuracy: |
Depends on the DS18B20 or DHT22 sensors |
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Humidity reading accuracy: |
Depends on the DHT22 sensor |
*Logic can be inverted in the digital input settings
** Can be configured in the analog input / voltmeter settings
Basic wiring diagrams
Legend
|
Terminals |
|
|---|---|
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GND |
Ground terminals |
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DATA 0/DATA1 |
1-Wire data terminals |
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VCC |
Sensor power supply terminals |
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VREF |
Reference voltage output |
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VREF + R1 |
Reference voltage through a pull-up resistor output for passive devices that need it to form a voltage divider. |
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AIN0 / AIN1 |
Analog inputs (0-10 V) |
|
DIN0 / DIN1 |
Digital inputs (±15 V) |
|
IN |
Potential-free solid-state relay input |
|
OUT |
Potential-free solid-state relay output |
Compliance and certification
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Shelly Pro Sensor Add-on multilingual EU declaration of conformity 289 2026-04-28.pdf
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Shelly Pro Sensor Add-on UK PSTI ACT statement of compliance 289 2026-04-28.pdf
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Shelly Pro Sensor Add-on UKCA declaration of conformity 289 2026-04-28.pdf
API and components
All Shelly devices and services
Printed user guide
Cable Manager - 3D Print File
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Download here: Shelly_ProSensorAddon_Cablemanager.STL
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Discussion topic: https://community.shelly.cloud/topic/14408-pro-sensor-add-on-cable-manager-kabelmanager/